Outer surface of a casserole



FIG. 1 is a perspective view of one embodiment of an outer surface of a casserole according to the new design;

FIG. 2 is a front view of an outer surface of the casserole shown in FIG. 1, the rear view and side elevation views being substantially identical thereto;

FIG. 3 is a top view of of an outer surface of the casserole shown in FIG. 1; and,

FIG. 4 is a bottom view of the outer surface of the casserole shown in FIG. 1.

The broken lines in the drawings are for illustrative purposes only and form no part of the claimed design. 

We claim the ornamental design for a outer surface of a casserole, as shown and described. 